Porsche 911 2018–2026 — technical service bulletin

Bulletin No. 31-20 · NHTSA communication 11024155 · issued Sep 26, 2025

Technical service bulletin

communication type

Electrical System

component

2018–2026

model years

vehicle entries

Official summary

Technical information for a Diagnosis and Handling of 12-Volt Lithium-Ion Battery (Vehicle Electrical System Battery)

Vehicles covered

2018 Porsche 911
2019 Porsche 911
2020 Porsche 911
2021 Porsche 911
2022 Porsche 911
2023 Porsche 911
2024 Porsche 911
2025 Porsche 911
2026 Porsche 911
2022 Porsche 911 4S
2020 Porsche 911 Carrera
2021 Porsche 911 Carrera
2022 Porsche 911 Carrera
2023 Porsche 911 Carrera
2024 Porsche 911 Carrera
2025 Porsche 911 Carrera
2023 Porsche 911 Carrera 4
2022 Porsche 911 Carrera 4 GTS
2023 Porsche 911 Carrera 4 GTS
2023 Porsche 911 Carrera 4S
2022 Porsche 911 Carrera GTS
2023 Porsche 911 Carrera GTS
2024 Porsche 911 Carrera GTS
2018 Porsche 911 Carrera S
2019 Porsche 911 Carrera S
2020 Porsche 911 Carrera S
2021 Porsche 911 Carrera S
2023 Porsche 911 Carrera S
2023 Porsche 911 Carrera T
2024 Porsche 911 Carrera T
2023 Porsche 911 Dakar
2024 Porsche 911 Dakar
2019 Porsche 911 GT2
2018 Porsche 911 GT2 RS
2019 Porsche 911 GT2 RS
2018 Porsche 911 GT3
2019 Porsche 911 GT3
2021 Porsche 911 GT3
2022 Porsche 911 GT3
2023 Porsche 911 GT3
2024 Porsche 911 GT3
2025 Porsche 911 GT3
2019 Porsche 911 GT3 RS
2023 Porsche 911 GT3 RS
2024 Porsche 911 GT3 RS
2022 Porsche 911 GT3 Touring
2023 Porsche 911 GT3 Touring
2018 Porsche 911 Targa 4
2019 Porsche 911 Targa 4
2020 Porsche 911 Targa 4
2021 Porsche 911 Targa 4
2023 Porsche 911 Targa 4
2023 Porsche 911 Targa 4S
2023 Porsche 911 Targa GTS
2018 Porsche 911 Turbo
2019 Porsche 911 Turbo
2020 Porsche 911 Turbo
2021 Porsche 911 Turbo
2022 Porsche 911 Turbo
2023 Porsche 911 Turbo

What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.